Work him hard! Lol. During the waking hours, keep him active so he will be tired later. Also, keep in mind that as he grows (and his interests develop), his sleep needs and patterns will change. If you need quiet time, then teach him that it's his quiet time, too, even if he doesn't sleep. You can't make him sleep, but put him down, anyway, and teach him to entertain himself for a certain amount of time. Can you put him in a bed (or a room) that he can't get out of, where he can safely play or otherwise entertain himself? Give him a later bedtime at night. Try to keep him up in late afternoon. 4pm is too late for a nap if you want him to go to sleep for the night at 7 or 8pm.